How do I sign up for a Microsoft account?

To use any Microsoft services, you need to create a Microsoft account—an email address and password that you use to sign in to all Microsoft sites and services, including Outlook.com, Xbox Live, OneDrive, and Office 365. You can also use a Microsoft account to sign in to your Windows Phone and to PCs running Windows 8.1 or Windows RT 8.1.

You can use an email address you already have as your Microsoft account, or create a new Microsoft account at Outlook.com.